<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <!-- 引入Vue -->
    <script src="../js/vue.js"></script>
    <title>01_天气案例</title>
</head>
<body>
    
    <!-- 
       
     -->


    <!-- 容器 -->
    <div id="root">
        <h2>今天天气很{{hot}}</h2>
        <!-- 绑定事件的时候：@xxx = "yyy" yyy可以写一些简单的语句 -->
        <button @click="changeWeather($event)">切换天气</button>
        <!-- <button @click="isHot = !isHot">切换天气</button> -->
    </div>

    <script type="text/javascript">
       Vue.config.productionTip=false; // 阻止 vue 在启动时生成生产提示。

       
    const vm =   new Vue({
        el:'#root',
        data() {
            return {
                isHot:true
            }
        },
        
        computed:{
            hot(){
                return this.isHot ? '炎热' : '凉爽';
            }
        },
        methods: {
            changeWeather(){
                this.isHot = !this.isHot;
            }
        }

          
      })
 
       
    </script>
</body>
</html>